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Maintenance
6. If the work equipment goes down under its weight and con-
tacts the ground, the accumulator is normal.
If the work equipment does not go down or stops in midway,
the charged pressure of the gas in the accumulator for the
hydraulic circuit has probably dropped.
Please contact your KOMATSU distributor for inspection.
7. This completes the inspection. After completion of the
inspection, set the lock lever to the LOCK position and turn
the starting switch to the OFF position.
Method of releasing pressure in hydraulic circuit
1. Place the work equipment on the ground. Close the crusher
attachment jaws, etc.
2. Operate the work equipment lock lever to the LOCK position.
Carry out Steps 3 - 5 within 15 seconds.
When the engine is stopped, the pressure in the accumulator
gradually goes down. For this reason, the check can only be car-
ried out immediately after the engine is stopped.
3. Stop the engine.
4. Turn the starting switch to the ON position (B).
5. Set lock lever to UNLOCK position, then operate the work
equipment control levers and the attachment control pedal
(option) fully to the front, rear, left, and right to release the
pressure in the control circuit.
6. Set the lock lever to the LOCK position, then turn the starting
switch to the OFF position.
PW180-7E0 – VEAM400102
4.11 Maintenance procedure
Every 2000 hours service
A
Lock
Unlock
GK018462
B
C
GK018461
4-97
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